Machine for interfolding sheets of cigarette papers



June 9, 1931. R. BRAUNSTEIN 1,809,671

MACHINE FOR INTERFOLDING SHEETS OF CiGARETTE PAPERS Filed June 27, 1927 2 Sheets-Sheet 1 69 Kim/744M,

June 9, 1931. R. BRAUNSTEIN 1,809,671

MACHINE FOR INTERFOLDING SHEETS OF CIGARETTE PAPERS Filed June 27. 1927 2 Sheets-Sheet 2 \\N()// 8 Rog 6/ Bra unsfe/n Patented June 9, 1931 UNITED STATES PATENT OFFICE- Rocrnn BRAUNSTEIN, on PARIS, FRANCE, ASSIGNOR T0 socm'rrn ANONYME nns ANGIENS ETAIBLISSEMEN'IS BRAUNSTEINTFRERES, 0F PARIS, FRANCE MACHINE FOR INTERFOLDING SHEETS CIGARETTE PAPERS Application filed June 27, 1927, Serial No. 201,867, and in France July 6, 1926.

The present invention has for its subject a machine for interfolding the sheets of cigarette paper, which is characterized by its arrangement as a whole and by the provision of auxiliary devices.

The sheets of paper are engaged between two conveying bands which hold them in their folded condition and convey them in front of interfolding wheels. Conveying levers acting by suction remove the sheets from between the conveying bands and pass them in their final condition into the tooth spaces of the interfolding wheels.

In this machine it is necessary for the continuous web unwound from the spool to be folded in the direction of the length by a special device, then cut into suitable lengths,

then fed into the teeth of interfolding wheels without being left free at any moment, but being, on the contrary, always conducted during the whole of its course by devices which hold it and prevent it from being carried away by the least blast of air as is the case in the majority of machines actually in ex- 'istence.v

The device for counting and separating in packets is characterized by the fact that, after every sixty sheets, for example, the sheet which is opposite one of the interfolding wheels instead of being introduced into this wheel is held automatically by a suitable device in sucha manner that a gap is formed in the interfolding, which gap-can be found very easily in the pile of interfolded'sheets collected in the magazine of the machine.

The invention will now be described with reference to the accompanying drawings wherein: V e Figure 1 is a side elevation of an interfolding machine in accordance with the present invention.

Figure 2 is an end view of the retaining device which conducts the sheets, by means of suction from the conveying bands to the interfolding wheels,

Figure 3 is a perspective view, somewhat diagrammatic showing the interfolding wheels,

Figure 4 vice.

shows in section the folding dewhich web is unwound under constant tension by means of a brake' device known per se and not illustrated in the drawings. The web of paper is then folded longitudinally along the middle by passing through a kind of slot or channel 3 and the web, thus folded longitudinally, then passes into the cutter device4.- I V Beyond the cutter device is placed a conveying device provided with a lower convey ing band;5 and an upper conveying band 6, these two bands moving in a direction such that the adjacent runs have imparted thereto movements of the same speed and inthe same direction, f

The upper band 6 is shorter than the lower band-5 by a lengthequal to or greater than the length of a sheet. p

These two'b'ands do not bear strongly one upon theother butthere is left between them a small amount of space suiiicient to enable the sheet of paper tobe withdrawn without tearing." I

Beyond this conveying device is placed a retaining member forthe sheets formed by a series of suction pipes 7 (Figures2 and 3) oscillating between the conveying devices and the. corresponding interfolding wheels 30. The wheels 30 are of the type constituting the subject matter of United States Patent 1,502,- 333. 7 e e These suction pipes are formedby hollow tubes and communicate internally with a source of suction and their ends are adapted to engage witht-he sheet of paper and carry it, withouteit being liable of falling off, to the teeth ofthe. interfolding wheel which isadapted to receive it.

lar sleeve 8 which is rocked by means of a lever 9 to which it is secured and which carries a roller 10 co-operating with a cam 11 against which said roller is pressed by a tension spring 12.

The pipes 7 are preferably mounted detachably on the hollow sleeve 8, and the arrangement illustrated in the drawings, which is particularly simple, gives good results in practice. The pipes 7 are provided at their lower ends with a truncated tip 27 which may be fitted into a socket of corresponding shape provided in the sleeve 8. A spring formed by an arcuate leaf 29 holds the pipe in position in its socket by simple pressure. In the case of stoppage the pipes can be removed readily and immediately and tested.

A roller 18, preferably provided with a material having a high coefficient of friction such as rubber, is supported by a lever 19 capable of oscillating about a shaft 20 mounted upon the frame 4 of the machine.

This lever 19 has secured to it a lever 21 having the same pivot and of which the end is formed by an angular stop 25 bearing upon a cam 22 and under the action of a spring 23.

The cam 22 is provided with a notch 24 into which the stop 25 of the lever 21 falls suddenly once per revolution. It will thus be seen that at regular intervals the roller 18 is pressed against the conveying band 5 and the sheet brought between the roller 18 and this conveying band, instead of being engaged by the suction device, and conducted to the interfolding wheel 30, is discharged directly into a suitable container 26 in such a manner that one of the sheets is withdrawn, at regular intervals, from the interfolding cycle.

Any suitable registering mechanism may be em loyed as the counting means and act-uated fi'om the shaft upon which the cam 22 is mounted or through the movement of the lever 21.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A machine for interfolding sheets of cigarette paper in which the paper is supplied in the form of a continuous web, comprising means for folding the web longitudinally before cutting, means for cutting the folded web into sheets of suitable length, toothed interfolding wheels for receiving the cut sheets, upper and lower conveying bands between which the sheets are conveyed from the cutting means to the interfolding wheels, a suction device by which the sheets are withdrawn from between the conveying bands and placed into the toothed spaces of the interfoldin wheels, the several elements being so arranged as to positively control the paper through the conveying and manipulative steps, so that at no moment is it left to itself during its passage through the machine. 

